Never forever. 158961 leaves Southampton with a Portsmouth - Cardiff train, 9th March.
Tuesday 6th March: 166206 on Westbury - Southampton & return
Wednesday 7th March:
Thursday 8th March: 1662xx on Westbury - Southampton & return
Friday 9th March:
Saturday 10th March: 59004 7O51 05:00 Westbury - Hamworthy one